Python regex re.Compile ()
import re
# \w is equivalent to [a-zA-Z0-9_].
p = re.compile('\w')
print(p.findall("He said * in some_lang."))
# \w+ matches to group of alphanumeric character.
p = re.compile('\w+')
print(p.findall("I went to him at 9 A.M., he \
said *** in some_language."))
# \W matches to non alphanumeric characters.
p = re.compile('\W')
print(p.findall("he said *** in some_language."))
Outrageous Ostrich